Question

The site of aerobic respiration in the bacterial cell wall is:

• A. episome
• B. mesosome
• C. ribosome
• D. mitochondria

Answer 1

The correct option is B

mesosome

The correct option is B.

Explanation of the correct option:

1. Because mitochondria are lacking in bacteria, respiratory activities are restricted to the plasma membrane and the cytoplasm.
2. Mesosomes (folded invaginations of the plasma membrane) increase plasma membrane surface area, which aids in increased respiratory rate.
3. Because enzymes linked with bacterial aerobic respiration are found on these infoldings.
4. The location of aerobic respiration in the bacterial cell wall is mesosome.

Explanation of the incorrect options:

Option A:

1. An episome is a genetic element found in certain bacterial cells.
2. It's mostly found in the DNA of bacteriophages that can reproduce independently of their hosts.
3. It exists in conjunction with a chromosome into which it is incorporated.

Option C:

1. The ribosome is an intricate molecule.
2. It is made up of proteins and ribosomal RNA molecules.
3. In cells, these proteins constitute a factory for protein production.
4. George E. Palade found them in 1955.
5. He defined them as tiny cytoplasmic particles.
6. They primarily interact with the membrane of the endoplasmic reticulum.

Option D:

1. Mitochondria are cell organelles that are membrane-bound.
2. They produce the majority of the chemical energy required to fuel the cell's metabolic operations.
3. This chemical energy is stored in the form of a tiny molecule known as adenosine triphosphate (ATP).

Final answer: The site of aerobic respiration in the bacterial cell walls is mesosome.